ACCOUNT OF AN OPEN-PIT COPPER MINE IN OPERATION. ILLUSTRATES THE MAIN STEPS IN EXTRACTING PURE COPPER FROM ORE. PICTURES THE PROCESSES OF BLASTING, LOADING and DISPOSING OF WASTE ROCK, LOADING ORE IN RAILROAD CARS, CRUSHING and WASHING.
byViking Pictures Corp. Encyclopaedia Britannica Films
This film shows the activities at an apple orchard in the Pacific Northwest. Although the orchard specializes in Delicious apples, a man is shown planting seeds from another variety which has stronger roots and trunks. Buds from Delicious trees are next grafted onto the hardy trunks, where they flourish and eventually become fruit. Pruning and irrigation also help the trees to become sturdy and productive. The spring blooms are pollinated by bees, by ladybugs, and by human help, as illustrated... ( 1 reviews )